Most of the codes you listed pertain to a problem with the evaporative emissions system (fuel vapor recovery) ,chances are your computer is fine
Check all the fuses first, chances are the distributor took a dump.
I did your emery board trick... lots of white stuff flaked off, but still no go.
I got an ignition tester from AutoZone ($7). Crude thing, pretty much just an adjustable screw where you're supposed to look for a spark. (!) I thought there was a removable central high voltage wire outside but it's under the cap, where a spring is. Removed the distributor cap, removed the spring, placed the ignition tester in position, strung an alligator-clip wire to ground, cranked dad's truck. Dad said no spark. Darn. Well I guess that $7 saved me from buying a new cap and rotor...
Oh yeah I got some OBD2 codes now too: P0505, P1490, P0446, P1105. They all seem to be pointing to a computer failure of some sort. I sure hope it doesn't come to that. I'll try and test for a signal to the distributor using Striker's links. Otherwise this might be a job for a pro...
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